Where naturalized landscape areas are installed around stormwater retention/detention facilities, the areas must remain as naturalistic as possible, resemble natural water features, provide habitat and stormwater management benefits, and improve water quality.
(A) Stormwater retention/detention pond improvement plan. Landscape improvement plans must be provided for all stormwater retention/detention facilities. The plan must demonstrate the ability of the proposed plant material to survive expected periods of inundation, based upon hydrologic studies.
(B) Components of a stormwater retention/detention pond improvement plan. Stormwater retention/detention pond improvement plans shall include the following:
(1) North point and scale;
(2) Topographic information and proposed grades;
(3) Location of existing and/or proposed inlets/outlets;
(4) Identification of all plant zones by elevation range (i.e. 721 - 723.5, HWL — 719, etc.)
(5) Identification of all seed mixes and planting rates per plant zone (i.e. Prairie, Wet Prairie, Emergent Wetland, Riparian Woods, Forested Wetland, Turf Grass, etc.);
(6) Hydrograph data for the 2- and 100-year rainfall events on a time vs. stage graph. Data for 5- and 10-year events may also be required if determined necessary by the Code Official;
(7) Herbivory protection netting for emergent planting zones or as deemed necessary by the Code Official;
(8) Perimeter landscaping comprised of a minimum of 20 plant units for every 100 linear feet of perimeter, or part thereof as measured at high water level;
(9) Location, type, size, quantity, and planting condition (balled and burlapped, bare root, etc.) of all proposed landscape materials;
(10) Common and botanical names of all proposed plant material;
(11) Location, size and common/botanical name of existing vegetation to remain;
(12) Symbols representing proposed plant material shall be drawn to scale showing two-thirds of full mature size and labeled as to quantity and type;
(13) Location of underground irrigation system, if any;
(14) Planting schedule;
(15) Near term monitoring and maintenance plan including the following:
(a) Site location;
(b) Names, addresses and telephone numbers of the party or parties responsible for near-term monitoring and management; and
(c) Schedule of expected near-term management and monitoring activities;
(16) Long term operation and maintenance plan including the following:
(a) Names, addresses and telephone numbers of the property owner(s) of the stormwater facility;
(b) Names, addresses and telephone numbers of the party or parties legally responsible for operations and management of the stormwater facility;
(c) Written documentation of acceptance by public agencies, as applicable; including associated capital expenses;
(d) A copy of the terms demonstrating that the long-term management agreement is recorded against all lots in the project;
(e) Location map identifying all permanent access (public and private), boundaries between traditional turfgrass areas and the naturalized areas covered by the plan, overland flow paths, and control structures;
(f) Educational pamphlet to be distributed at closing for all lots in the development that the stormwater retention/detention facility serves;
(g) Schedule of expected long-term management activities; and
(h) Cost estimate for routine and non-routine expenses and dedicated source(s) of funding for continued inspection, operation and maintenance.
(Ord. 1565, passed 4-1-96; Am. Ord. 2341, passed 12-18-06) Penalty, see § 158.99